A modular oven includes a plurality of interlockable insulated panels for user assembly into a cubic structure of an oven. The panels include a top panel, a bottom panel, a left panel, a right panel, a back panel, and a front panel. The front panel can be pivotally mounted to the left or right panel and serves as a door for the modular oven. The top panel and the bottom panel are selectively coupled to the left, back, and right panels by mounting pegs. The bottom panel is provided with a heating element on one side and a plurality of casters on the other side to facilitate transporting the oven. A control module is selectively coupled to one of the panels to control operations of the oven. The oven may also be provided with a trolley system to facilitate transport of workpieces to and from the oven.